KR100299764B1 - Anti-lock brake system for vehicle - Google Patents

Anti-lock brake system for vehicle Download PDF

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Publication number
KR100299764B1
KR100299764B1 KR1019970058648A KR19970058648A KR100299764B1 KR 100299764 B1 KR100299764 B1 KR 100299764B1 KR 1019970058648 A KR1019970058648 A KR 1019970058648A KR 19970058648 A KR19970058648 A KR 19970058648A KR 100299764 B1 KR100299764 B1 KR 100299764B1
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South Korea
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pressure
high pressure
master cylinder
modulator
orifice
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KR1019970058648A
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Korean (ko)
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KR19990038786A (en
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김영일
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밍 루
주식회사 만도
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/3675—Electromagnetic valves specially adapted for anti-lock brake and traction control systems integrated in modulator units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/36—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition including a pilot valve responding to an electromagnetic force
    • B60T8/3615—Electromagnetic valves specially adapted for anti-lock brake and traction control systems
    • B60T8/363—Electromagnetic valves specially adapted for anti-lock brake and traction control systems in hydraulic systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/10—ABS control systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

PURPOSE: An anti-lock brake system(ABS) for a vehicle is provided to make a modulator lightweight and compact by integrating a solenoid valve with a check valve for releasing pressure. CONSTITUTION: A booster(2) and a master cylinder(3) generate negative pressure when a brake pedal(1) is operated. A modulator(7) connected to the master cylinder(3) controls a wheel(W). A high pressure pump(80) changes hydraulic pressure in an accumulator(8) into high pressure, and feeds the high pressure when the ABS is operated. A chamber(82) and an orifice(84) decrease the pulsation of the high pressure from the high pressure pump(80). A check valve(86) prevents hydraulic pressure through the orifice(84) from flowing backward. The modulator(7) flows oil through only the orifice(84) in the ABS mode, and returns oil by moving a spool(72) backward by the reaction of a spring(74) in release.

Description

차량용 미끄럼방지장치Vehicle anti-skid device

본 발명은 차량 제동력 조절을 위한 미끄럼방지장치((Anti-lock Brake System)에 있어 기존의 솔레노이드와 체크밸브를 일체로 통합하여 소형 경량화 및 콤펙트화 된 모듈레이터를 제공함에 있는 것이다.The present invention is to provide a compact, lightweight and compact modulator by integrating the existing solenoid and check valve integrally in the anti-lock brake system for controlling the braking force of the vehicle.

잘 알려진 바와 같이 차량에는 운전자의 필요에 의해 주행중인 차량을 제동시키도록 된 제동장치 및 ECU와 연계하여 보다 안정적인 제동이 이루어질 수 있도록 된 지능형 제동장치가 마련되어 있다.As is well known, the vehicle is provided with a braking device which is configured to brake the vehicle on demand by the driver's needs and an intelligent braking device which enables more stable braking in connection with the ECU.

대표적인 예로서 지능형 제동장치는 제동시 차륜의 슬립 현상을 방지하는 미끄럼방지장치(Anti-lock Brake System ; 이하 ABS라 함)가 주로 이용되고 있다.As a representative example, an anti-skid device (Anti-lock Brake System; ABS) is mainly used to prevent slippage of a wheel during braking.

ABS는 정상 상태 즉, 미끄럼이 일어나지 않는 상태에서 플런저가 피스톤펌프로 통하는 유로를 막아 마스터실린더에서 발생한 유압이 유량조절밸브를 통하여 브레이크로 직접 전달되어 제동력을 일으키고, 슬립율이 증가하여 제동압 감소가 필요한 경우 ECU가 솔레노이드에 전류를 공급하여 브레이크 압력을 감소시키고, 압력 감소가 계속되어 차륜의 슬립율이 규정값 이하로 떨어지면 솔레노이드에 전류를 차단하여 압력실의 압력을 회복시키고, 압력 증가 상태에서 다시 압력 감소가 필요한 경우에는 솔레노이드가 작동되어 압력 감소 상태로의 복귀가 가능하므로 브레이크 압력을 적절하게 조정하도록 구성되고 있다.ABS blocks the flow path through the plunger to the piston pump in the normal state, that is, no slippage, so that the hydraulic pressure from the master cylinder is transferred directly to the brake through the flow control valve, causing the braking force, and the slip ratio increases to reduce the braking pressure. If necessary, the ECU supplies a current to the solenoid to reduce the brake pressure, and if the pressure continues to decrease and the wheel slip ratio falls below the specified value, the ECU shuts off the current to restore the pressure in the pressure chamber and resumes the pressure increase. When pressure reduction is required, the solenoid is activated to return to the pressure reduction state, so that the brake pressure is properly adjusted.

이와 같이 통상의 ABS는 운전자가 브레이크페달을 밟아 유압에 의해 제동부를 가압하여 제동력을 주는 것으로, 갑작스런 제동력에 의해 차륜의 잠김 현상이 일어나, 차량의 미끄럼 현상이 발생하지 않도록 제동부를 가압하는 유압을 조절하여, 차륜에 작용하는 제동력을 연속적으로 풀어 주었다 감아 주는 것을 반복하여 차량이 안전하게 정지할 수 있게하므로서 제동시 차륜의 슬립 현상을 방지하여 제동의 안정성 및 승차감 등이 향상시키도록 구성되고 있다.As described above, in general ABS, the driver presses the brake pedal to pressurize the brake unit by hydraulic pressure to give a braking force, and the hydraulic pressure that presses the brake unit so that the wheel locking phenomenon occurs due to a sudden braking force does not occur. It is configured to improve the stability and riding comfort of the wheel by preventing the slip phenomenon of the wheel during braking by repeating the repeated release and winding of the braking force acting on the wheel by adjusting the.

하지만 종래에는 도 1에 나타낸 바와 같이 운전자가 페달(1)을 밟으면 부스터(2)와 연결된 마스터실린더(3)의 구동에 의해 발생한 압력은 솔레노이드밸브(4,5)로 유입되고, ABS 모드가 작동중이거나 노말 파킹(Normal Parking)시 운전자가 페달에서 발을 떼어 압력을 해지할 경우 노말 파킹시에는 솔레노이드밸브(4)의 오리피스(40) 사이즈가 작은 관계로 압력 해지가 신속하게 이루어지지 않는 문제점이 있고, ABS 모드시에는 솔레노이드밸브(5)가 작동 중이므로 유로가 차단되어 압력 해지가 전혀 이루어지지 않게 된다.However, as shown in FIG. 1, when the driver presses the pedal 1, the pressure generated by the driving of the master cylinder 3 connected to the booster 2 flows into the solenoid valves 4 and 5, and the ABS mode is operated. When the driver releases the pedal to release the pressure during normal or normal parking, the pressure release does not occur quickly due to the small size of the orifice 40 of the solenoid valve 4 during normal parking. In the ABS mode, since the solenoid valve 5 is in operation, the flow path is blocked so that the pressure is not released at all.

그리하여 종래에는 마스터실린더측에 압력해지용 체크밸브(6)를 별도로 부가하여 노말 파킹시나 ABS 모드 작동시에도 마스터실린더(3)의 압력을 해지토록 구성하므로써 구조가 복잡하여 이를 소형 경량화 시키는데 많은 어려움을 안고 있었다.Therefore, in the related art, a pressure relief check valve 6 is separately added to the master cylinder to configure the pressure of the master cylinder 3 to be released even in normal parking mode or ABS mode operation. I was hugging.

본 발명은 상기한 바와 같은 종래의 문제점을 해소하기 위해, 차량용 미끄럼방지장치에 있어 기존의 솔레노이드밸브와 압력해지용 체크밸브를 일체로 통합하여 부품 단순화를 꾀함과 아울러 이를 소형 경량화 시킴에 그 목적이 있는 것이다.The present invention, in order to solve the conventional problems as described above, in the vehicle anti-skid device integrated the existing solenoid valve and pressure release check valve integrally to simplify the parts and to reduce the size and its purpose is to It is.

또한, 본 발명에서는 모듈레이터 내의 유로 설치가 용이하게 하여 보다 값싸고 저렴한 가격으로 제공되는 ABS 모듈레이터를 제공함에 있는 것인 바, 이를 첨부 도면에 의거하여 그 구성 및 작용 효과를 설명하면 다음과 같다.In addition, the present invention is to provide an ABS modulator that is easy to install the flow path in the modulator to provide a cheaper and cheaper price, based on the accompanying drawings and will be described as follows.

도1 은 종래의 ABS의 구성도,1 is a block diagram of a conventional ABS,

도2는 본 발명이 적용된 ABS 모듈레이터의 구성도.2 is a block diagram of an ABS modulator to which the present invention is applied.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1 ; 페달 2 ; 부스터One ; Pedal 2; booster

3 : 마스터실린더 W ; 차륜3: master cylinder W; Wheel

4,5: 솔레노이드 6 ; 체크밸브4,5: solenoid 6; Check valve

7 ; 모듈레이터 8 ; 어큐무레이터7; Modulator 8; Accumulator

도 2는 본 발명이 적용된 ABS 모듈레이터의 개략적인 구성도이다.2 is a schematic configuration diagram of an ABS modulator to which the present invention is applied.

이에 도시된 바와 같이 브레이크페달(1)의 작동시 유압을 발생시키는 부스터(2) 및 마스터실린더(3)가 구비되고, 상기 마스터실린더(3)에 연결되어 차륜(W)을 제어하는 모듈레이터(7)와, ABS 작동시 어큐무레이터(8)에 저장된 유압을 고압으로 토출시키는 고압펌프(80)와, 상기 고압펌프(80)에서 토출된 고압력의 맥동을 감소시키는 챔버(82) 및 오리피스(84)와, 상기 오리피스(84)를 통과한 유압이 역류되는 것을 방지하는 첵크밸브(86)를 포함하는 구성으로 되고 있다.As shown therein, a booster 2 and a master cylinder 3 for generating hydraulic pressure when the brake pedal 1 is operated are provided, and a modulator 7 connected to the master cylinder 3 to control the wheel W is provided. ), A high pressure pump 80 for discharging the hydraulic pressure stored in the accumulator 8 at a high pressure during ABS operation, and a chamber 82 and an orifice 84 for reducing the high pressure pulsation discharged from the high pressure pump 80. ) And a check valve 86 for preventing back flow of the hydraulic pressure passing through the orifice 84.

상기 구성에 있어 모듈레이터(7)는 ABS 모드시에는 스풀(72)과 솔레노이드(70) 사이의 오리피스만을 통해 흐르도록 되고, 해지시에는 스프링(74)의 반력에 의해 스풀(72)이 후동되어지며 오일이 복귀하도록 구성되고 있다.In the above configuration, the modulator 7 flows through only the orifice between the spool 72 and the solenoid 70 in the ABS mode, and when released, the spool 72 is driven by the reaction force of the spring 74. The oil is configured to return.

이러한 구성으로 된 본 발명의 동작 설명은 다음과 같다.The operation description of the present invention having such a configuration is as follows.

먼저, 운전자가 브레이크페달(1)을 밟으면, 마스터실린더(3)에서 유압이 발생하고, 그 유압은 모듈레이터(7)를 통과하여 차륜(W)에 공급되므로 차량의 속도를 감속하며 제동하게 된다.First, when the driver presses the brake pedal 1, oil pressure is generated in the master cylinder 3, and the oil pressure is supplied to the wheels W through the modulator 7, thereby decelerating and braking the vehicle speed.

그런데, 차륜(W)의 제동시 차량의 추진력에 의하여 얼음판과 같은 미끄러운 노면에서 차륜(W)에 슬립 현상이 발생하면 마스터실린더(3)쪽 유압은 차단됨과 동시에 저압차단 솔레노이드(75)가 개방되어지며 차륜(W)에 작용하던 유압은 어큐무레이터(8)로 이송되어 축압되며, 이때 차륜(W)에 작용하던 제동압력이 감소하여 차륜(W)의 잠김이 일시 해지되면서 다시 회전하게 되므로 차륜(W)의 미끄러지는 현상이 사라지게 된다.However, when a slip phenomenon occurs on the wheel W on a slippery road surface such as an ice plate during braking of the wheel W, the hydraulic pressure of the master cylinder 3 is blocked and the low pressure blocking solenoid 75 is opened. The hydraulic pressure acting on the wheel W is transferred to the accumulator 8 to accumulate pressure. At this time, the braking pressure applied to the wheel W decreases, so that the locking of the wheel W is temporarily stopped. The sliding phenomenon of (W) disappears.

이후 다시 차륜(W)에 제동압력을 증가시키기 위해 모듈레이터(7)가 개방시키는 동시에 저압차단 솔레노이드(75)를 차단시켜 원상 복귀시키게 되고, 어큐무레이터(8)에 축압된 유압은 고압펌프(80)로 흡입되어 펌프 작동에 의하여 고압으로 토출된다.Thereafter, the modulator 7 opens to increase the braking pressure on the wheel W, and at the same time, the low pressure blocking solenoid 75 is shut off to restore the original condition. The hydraulic pressure accumulated in the accumulator 8 is a high pressure pump 80. ) Is discharged at high pressure by pump operation.

이렇게 토출된 유압은 다시 차륜(W)에 공급되므로써 차륜(W)은 다시 제동되게 된다.The hydraulic pressure discharged in this way is supplied to the wheel W again, so that the wheel W is braked again.

이와 같이 본 발명은 ABS가 통합된 제동시스템을 차량의 전후 4개의 차륜에 각각 사용하면, 간단하면서도 소형화된 저가격의 CDC(Car Dynamic Control)를 구현할 수 있게 된다.As described above, the present invention can implement a simple and miniaturized low-cost CDC (Car Dynamic Control) by using the ABS integrated brake system on each of the front and rear four wheels.

이상에서 설명한 바와 같이 본 발명에 의하면, ABS가 설치된 차량에 있어서 솔레노이드와 압력해지용 체크밸브를 일체로 형성하여 소형 경량화된 저가형 모듈레이터를 제공받을 수 있는 것이며, 구조적인 측면에서도 크기가 현저하게 축소되어 제작이 매우 편리한 동시에 원가가 절감되며, 장착 공간도 현저히 감소되므로 소형 차량에도 장착하기 용이하다는 효과가 있다.As described above, according to the present invention, in a vehicle equipped with ABS, a solenoid and a pressure release check valve may be integrally formed to provide a compact, lightweight, and low-cost modulator, and in terms of structure, the size is significantly reduced. It is very easy to manufacture and cost is reduced, and the installation space is also significantly reduced, so it is easy to install in small vehicles.

Claims (1)

브레이크페달(1)의 작동시 유압을 발생시키는 부스터(2) 및 마스터실린더(3)와, 상기 마스터실린더(3)와 연결된 저압차단 솔레노이드(75)와, 상기 저압차단 솔레노이드(75)를 통과한 유압을 저장할 수 있도록 마련된 어큐뮬레이터(8)와, 상기 어큐뮬레이터(8)에 저장된 유압을 고압으로 토출시키는 고압펌프(80)와, 상기 고압펌프(80)에서 토출된 고압력의 맥동을 감소시키는 챔버(82) 및 오리피스(84)와, 상기 오리피스(84)를 통과한 유압이 역류되는 것을 방지하는 체크밸브(86)를 구비한 차량용 미끄럼방지장치에 있어서, 상기 마스터실린더(3)에 연결되어 차륜(W)을 제어할 수 있도록 상기 마스터실린더(3)와 차륜(W)의 사이에는, 축방향 이동 가능하도록 플런저(71)가 내장된 솔레노이드(70)와, 상기 플런저(71)의 동작에 따라 그 사이로 유로를 개폐하며 유압의 복귀시 상기 플런저(71)와 이격될 수 있도록 마련된 중공의 스풀(72)과, 상기 스풀(72)을 상기 플런저(71) 측으로 지지할 수 있도록 마련된 스프링(74)으로 이루어진 모듈레이터(7)가 구비된 것을 특징으로 하는 차량용 미끄럼장치.Passing the booster (2) and the master cylinder (3) for generating hydraulic pressure during operation of the brake pedal (1), the low pressure blocking solenoid (75) connected to the master cylinder (3), and the low pressure blocking solenoid (75) Accumulator 8 provided to store the hydraulic pressure, a high pressure pump 80 for discharging the hydraulic pressure stored in the accumulator 8 at a high pressure, and a chamber 82 for reducing the pulsation of the high pressure discharged from the high pressure pump 80 And an orifice (84) and a check valve (86) for preventing back flow of the hydraulic pressure passing through the orifice (84), the wheel (W) connected to the master cylinder (3) ) Between the master cylinder (3) and the wheel (W), the solenoid (70) in which the plunger (71) is built so as to be able to move axially therebetween, and according to the operation of the plunger (71). Hydraulic return by opening and closing the flow path A hollow spool 72 provided to be spaced apart from the plunger 71 and a modulator 7 made of a spring 74 provided to support the spool 72 toward the plunger 71 are provided. Vehicle sliding device characterized in that.
KR1019970058648A 1997-11-07 1997-11-07 Anti-lock brake system for vehicle KR100299764B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100953387B1 (en) * 2003-12-24 2010-04-20 두산인프라코어 주식회사 Emergency braking system of brake valve

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100774133B1 (en) * 2003-04-21 2007-11-08 주식회사 만도 Anti-lock brake system
KR20060005306A (en) * 2005-12-19 2006-01-17 정보문 Master cylinder for automatic parking brake

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950018233U (en) * 1993-12-22 1995-07-22 Anti-lock brake system modulator hydraulic circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR950018233U (en) * 1993-12-22 1995-07-22 Anti-lock brake system modulator hydraulic circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100953387B1 (en) * 2003-12-24 2010-04-20 두산인프라코어 주식회사 Emergency braking system of brake valve

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